[petsc-users] Makefile for mixed C++ and Fortran code

[Danyang Su]

Hi All,

My code needs to link to an external C++ library (CGAL). The code is 
written in Fortran and I have already written interface to let Fortran 
call C++ function. For the sequential version without PETSc, it can be 
compiled without problem using the following makefile. The parallel 
version without CGAL can also be compiled successfully. However, when I 
tried to use PETSc together with CGAL library, I cannot compile the 
code. My questions is: How can I modify the makefile? Do I need to 
reconfigure PETSc with special flags? All the makefile samples are shown 
below.

#makefile for sequential version

FC = gfortran
#FC = ifort
CXX = g++ -std=c++11

DLIB = -lstdc++ -lm -L/usr/local/lib -rdynamic /usr/local/lib/libmpfr.so 
/usr/local/lib/libgmp.so /usr/local/lib/libCGAL_ImageIO.so.11.0.1 
/usr/local/lib/libCGAL.so.11.0.1 /usr/local/lib/libboost_thread.so 
/usr/local/lib/libboost_system.so -lpthread -lGLU -lGL -lX11 -lXext -lz 
/usr/local/lib/libCGAL_ImageIO.so.11.0.1 
/usr/local/lib/libCGAL.so.11.0.1 /usr/local/lib/libboost_thread.so 
/usr/local/lib/libboost_system.so -lpthread -lGLU -lGL -lX11 -lXext -lz 
/usr/local/lib/libmpfr.so /usr/local/lib/libgmp.so 
/usr/local/lib/libboost_thread.so /usr/local/lib/libboost_system.so 
-lpthread -Wl,-rpath,/usr/local/lib

FFLAGS = -O3
CXXFLAGS = -O3

FPPFLAGS =  -DUSECGAL

SRC =./../../

SOURCES = $(SRC)usg/math_common.o\
     $(SRC)usg/geometry_definition.o\
     $(SRC)usg/cgal_common.o\

...

executable: $(SOURCES)
     $(FC) $(FFLAGS) $(FPPFLAGS) -o executable.out $(SOURCES) ${LIS_LIB} 
$(DLIB)
%.o:%.F90
     $(FC) $(FFLAGS) $(FPPFLAGS) -c -frounding-math $< -o $@
%.o:%.cpp
     $(CXX) $(CXXFLAGS) $(CPPFLAGS) -c -frounding-math $< -o $@


#makefile for parallel version with PETSc, without CGAL

#FC = ifort
#FC = gfortran

DLIB = -lm

FFLAGS = -O3

FPPFLAGS =  -DUSEPETSC

SRC =./../../

SOURCES = $(SRC)usg/math_common.o\
     $(SRC)usg/geometry_definition.o\
     $(SRC)usg/cgal_common.o\

...

executable: $(SOURCES) chkopts
     -${FLINKER} $(FFLAGS) $(FPPFLAGS) $(CPPFLAGS)  -o executable.out 
$(SOURCES) ${PETSC_LIB}


#makefile for parallel version with PETSc, with CGAL, CANNOT work

#FC = ifort
#FC = gfortran

DLIB = -lm

FFLAGS = -O3

FPPFLAGS =  -DUSEPETSC -DUSECGAL

SRC =./../../

SOURCES = $(SRC)usg/math_common.o\
     $(SRC)usg/geometry_definition.o\
     $(SRC)usg/cgal_common.o\

...

executable: $(SOURCES) chkopts
     -${FLINKER} $(FFLAGS) $(FPPFLAGS) $(CPPFLAGS)  -o executable.out 
$(SOURCES) ${PETSC_LIB}

%.o:%.F90
     $(FC) $(FFLAGS) $(FPPFLAGS) -c -frounding-math $< -o $@
%.o:%.cpp
     $(CXX) $(CXXFLAGS) $(CPPFLAGS) -c -frounding-math $< -o $@


Thanks,

Danyang